DTC B0020-1A, B0020-2B (2014 2015 2016)
DTC B0020-1A : Decreased Resistance in the Driver's Side Airbag Inflator DTC B0020-2B : Short to Another Wire Harness in the Driver's Side Airbag Inflator
Special Tools Required
-SRS Inflator Simulator 07SAZ-TB4011A
-SRS Simulator Lead K 070AZ-SNAA200
-SRS Short Canceller 070AZ-SAA0100
- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components of the correct part number, and that they were properly installed .
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and Battery Terminal Disconnection and Reconnection - Refer to: Battery Terminal Disconnection and Reconnection (2016 2017 2018 2019 2020) or Battery Terminal Disconnection and Reconnection (2014 2015) .
- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software , and retest.
| DTC Description | DTC |
|---|---|
| B0020-1A Decreased resistance in the driver's side airbag inflator | |
| B0020-2B Short to another wire harness in the driver's side airbag inflatornotype |
DTC (SRS)
- Problem verification
-1. Clear the DTCs with the HDS.
- 2. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 3. Check for DTCs with the HDS.
DTC Description DTC B0020-1A Decreased resistance in the driver's side airbag inflator B0020-2B Short to another wire harness in the driver's side airbag inflatornotype Is DTC B0020-1A or B0020-2B indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures . If another DTC is indicated, troubleshoot the DTC.
- Driver's side airbag inflator check
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the negative cable from the battery, then wait at least 3 minutes.
- 3. Disconnect the driver's side airbag inflator 4P connector (A) on the floor wire harness.
- 4. Connect the terminals of SRS simulator lead K to the SRS inflator simulator (2 Ω connectors), then connect SRS simulator lead K to the driver's side airbag inflator 4P connector on the floor wire harness.
- 5. Reconnect the negative cable to the battery.
- 6. Clear the DTCs with the HDS.
- 7. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 8. Check for DTCs with the HDS.
DTC Description DTC B0020-1A Decreased resistance in the driver's side airbag inflator B0020-2B Short to another wire harness in the driver's side airbag inflatornotype Is DTC B0020-1A or B0020-2B indicated?
YES
Go to step 3.
NO
Short to another wire in the driver's side airbag inflator; replace the driver's side airbag , then clear the DTC.
- Shorted wire check (LSA+ line to LSA- line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the negative cable from the battery, then wait at least 3 minutes.
- 3. Disconnect the following connector.
SRS unit connector B (39P) - Refer to: SRS Unit Removal and Installation (2014 2015 2016) - 4. Disconnect the SRS inflator simulator from SRS simulator lead K. Do not disconnect SRS simulator lead K from the driver's side airbag inflator 4P connector on the floor wire harness.
- 5. Connect the SRS short canceller to SRS unit connector B (39P) terminals No. 5 and No. 6.
- 6. Measure the resistance of the test point.
Test condition Vehicle OFF (LOCK) mode Driver's side airbag inflator 4P connector (on the floor wire harness): disconnected SRS unit connector B (39P): disconnected Driver's side airbag inflator 4P connector (on the floor wire harness): connected to SRS simulator lead K SRS unit connector B (39P) No. 5 and No. 6: connected to SRS short canceller Test circuit LSA+, LSA- Test point SRS simulator lead K black terminal Is there an open circuit, or at least 1 MΩ?
YES
The LSA+ and LSA- wires are OK. Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit - Refer to: SRS Unit Removal and Installation (2014 2015 2016) . If the DTC does not clear, replace the floor wire harness.
NO
Short to another wire in the floor wire harness; replace the floor wire harness, then clear the DTC.